<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    body {
      background-color: black;
    }
    .popupMask {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      z-index: 100;
      background-color: none;
      animation: maskShow .8s both;
      font-size: 40px;
    }

    /* TODO chart入场动画 */
    .chartsAnimation {
      z-index: 1;
      border-radius: 6px;
      animation: chartsAnimation 1s ease both;
    }

    .chartWrap {
      position: absolute;
      overflow: hidden;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
      width: 1700px;
      height: 800px;
      background-color: #fff;
      box-sizing: border-box;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .content {
      min-width: 300px;
    }

    @keyframes chartsAnimation {
      /* // 三阶段 从底部弹出小方块、高度增加、宽度增加、显示内容 */
      0% {
        width: 4px;
        height: 70px;
        top: 105%;
        left: 50%;
      }

      20% {
        width: 4px;
        height: 70px;
        top: 50%;
        left: 50%;
      }

      22% {
        width: 4px;
        height: 70px;
        top: 50%;
        left: 50%;
      }

      50% {
        width: 4px;
        height: 800px;
        top: 50%;
        left: 50%;
      }

      52% {
        width: 4px;
        height: 800px;
        top: 50%;
        left: 50%;
        padding: 30px 0;
      }

      100% {
        width: 1700px;
        height: 800px;
        top: 50%;
        left: 50%;
        padding: 30px 50px;
      }
    }
  </style>
</head>

<body>
  <div class="popupMask">
    <div class="chartWrap chartsAnimation">
      <div class="content">群除我佬！！！</div>
    </div>
  </div>
</body>

</html>